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Elanso [62]
3 years ago
13

Which two practices are examples of how people use science?

Chemistry
2 answers:
BigorU [14]3 years ago
8 0

Answer:

B.

Explanation:

Anika [276]3 years ago
4 0

B. Developing theories using many lines of evidence

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Veronika [31]

Answer:

A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly different substances or phases. The three phases or states of matter are gas, liquid, and solid.

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Which of the following best describes the location of element Tin?
Tomtit [17]

Answer:

The location of element tin is

Group 14, Period 5

Explanation:

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. Never start a job without knowing the ___________ and ______________ of the chemicals you are working with.
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For the following example, list the given and unknown information (including gratis or moles)
Setler79 [48]

Answer:

9.6 moles O2

Explanation:

I'll assume it is 345 grams, not gratis, of water.  Hydrogen's molar mass is 1.01, not 101.

The molar mass of water is 18.0 grams/mole.

Therefore:  (345g)/(18.0 g/mole) = 19.17 or 19.2 moles water (3 sig figs).

The balanced equation states that:  2H20 ⇒ 2H2 +02

It promises that we'll get 1 mole of oxygen for every 2 moles of H2O, a molar ratio of 1/2.

get (1 mole O2/2 moles H2O)*(19.2 moles H2O) or 9.6 moles O2

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2 years ago
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